Agitator



June 24, 1930. E, R, MILLER 1,767,601

Filed Feb. 10, 193

- i 5 l I INVENTOR.

=1 TTORNEY.

"FEES nmm EAR-L 3. MILLER, or onnvELA-nn; c1110 Amman;

Application filed February-10, 1 93 0. i'Serial' Ho; y f

This invention relates to an agitator for use in connection with the slide precipitation test which is now being largely used as a substitute for the l/Vassermann test. 1

The principal object of this invention is to provide an'agitator which may be used to agitate a small amount of liquid carried by a grease ring receptacle on a glass slide and which will impart thereto a motion of a substantially elliptical character in a horizontal plane.

Referring to the accompanying drawings, Fig. 1 is an elevational view of my improved agitator; Fig. 2 is a detail fragmentary view of the slide holder drawn to a larger scale; and Fig. 3 is a plan view of, the device shown in Fig. '1. v

My improved agitator includes a base 10 having a table l1 supported on portion 11 and having the upper surface thereof paral lel with the lower surfaceof the base 10.

In use the device will be set on 'a'horizontal posite the supporting members 22. A pivot pin 12 rigidly attached to the member 11 extends upwardly therefrom and'has a pulley 13 mounted thereon. A pin 14 is car- -ried by said pulley eccentrically thereof and is internally threaded to receive a'small pin 15 about which the spring 17 is hooked. As clearly shown in the drawings, the springs 17 and 23 serve to hold the slide holder 20 in proper position on the table and it should be noted that the points of attachment of the springs tothe members 16- and 22 are such that the slide holder is pressed slightly downwardly against the top of the table 11. It may be desirable'in use to lubricate the contacted surfaces of the slide holder 20 and table 11*.

The slide holder 20 comprises a flat metallic member with upturned rim portions, lugs 24- to which the springs 23 are attached and the finger 21 which coacts with the pin 14 to impart agitating motion. Azfinger opening- 25 isprovided for convenience in inserting and removing the slide. 5

Ajs seen in the broken-away portionfof' Fig.-2,"-the slide- 26 isa glass microscope of suitable dimensions'iand the a liquid? holding.

receptacles are provided by a ring 27 of grease applied to the slide and; into: which the liquid to beagi tated is poured: Any

convenient number of these receptacles may be employed. I I a l/Vhilei this device has been-"- especiallyv adapted-for use connection withthe slide precipitation test, it: is evident that it' may be variously usedirin other cases where the .a; ;itationrequirements are similar; a

llt hile I; have shown one embodiment of" my: 1nvent1on, I wish it understood that-I am not limited to the details-o f-suclrqembodiment but may carry out; myinvention 111 numerous varying forms. I

-' H aving. thus descrlbe'd m'y invention, "what I c'l'afim'is: 1 1. Anag1tator ncluding a base, ahorizontal table carried by said base, a slide holder slidable on said table, opposing spring means connectedto said slide holder and normally positioning the same with respect to said table, and means carried by said basefor giving to one point on said slide holder, a rotary motion in a horizontal plane. I I p 2. An agitator including a base, a horizontal table carried by said'base, a slide holder slidable on said table, opposing spring means connected to said slide holder posts in fixed relation to said table, springs attached at one endto said attachingmeans, a slide holder slidable on said table, said springs being attached at their other ends to said slideholder, a pulley rotatably mounted on said base and a pin carried by and normally positioning the same, with 20 a. about sald-pin, a second p111 earned-by said said pulley eccentrically thereof and pass ing through a portion of said slide holder,

said agitator including'means constraining 7 said slide-holder to move only in a horizontal plane. 7 g

4. An agitator including a base, a horizontaltable carried by said base, a rotatable member carriedby said base ,and'mounted to rotate about an axis substantially perpendicular to the surface of said table, a horizontally disposed slide holder slidably vassociated with said table, means "for pivoting one point on s'aidslide-holder to said rotatable member eccentric to the axis thereof and means constraining the re-' mainder of said slide-holder to apredeter.

v mined motion in a horizontal plane{ I 5. An agitator including a base, a horizontal table carried by said base, a vertical pin mountedon said base, a pulleyrotatable pulley eccentric to the axis thereof, a slideholder slidable on said table, attaching arms carriedby said table and spaced apart at their ends a distance greater than the Width of the slide-holder, said arms being on the side of the table opposite said pulley, a post carried by said base on the side ofthe pulley opposite the table, springsconnecting said attaching arms to spaced points on one end of said slide-holder, and a spring connect- 7 ing said postwith said second pin, a portion of said slide-holder being journalled on said second pin. a s

6. The invention defined in claim .5 wherein further the point of attachnientlof said springs to said arms is below-the point of attachment thereof to said slide-holder.

- EARL R. MILLER. 

